note ColonelPanic <p>Here is an example of how you could recurse through a structure of hash references in practice.</p> <p>It uses the <code>ref</code> function to determine whether a given level is a hash reference.</p> <code> use Modern::Perl; my %ref_chain = ( 'key1' => { 'key2' => { 'key3' => 'not a reference' } }, 'key4' => { 'key5' => 'no ref here' } ); sub traverse_hashes { my $hashref = shift; foreach my $key (keys %$hashref) { if (ref $hashref->{$key} eq 'HASH') { say "$key is a hash ref. Recursing."; traverse_hashes($hashref->{$key}); } else { say "$key is not a hash ref (value: $hashref->{$key})"; } } } traverse_hashes(\%ref_chain); </code> <div class="pmsig"><div class="pmsig-27571"> <br><br>When's the last time you used duct tape on a duct? --Larry Wall </div></div> 1006411 1006411